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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A (Mn2NiII)-Ni-III single-chain magnet separated by a thick isolating network of BPh4- anions
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A (Mn2NiII)-Ni-III single-chain magnet separated by a thick isolating network of BPh4- anions

机译:(Mn2NiII)-Ni-III单链磁体,由BPh4-阴离子的厚隔离网络隔开

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摘要

The assembly reaction of a Mn(III) salen-type dimeric complex, [Mn-2(III)(saltmen)(2)(H2O)(2)](ClO4)(2) (saltmen(2-) = N, N' -( 1,1,2,2- tetramethylethylene)bis(salycylideneiminate)), and a Ni(II) oximato complex, [Ni-II( pao)(2)(phen)] ( pao(-) = pyridine-2-aldoximate; phen = 1,10-phenanthroline), in the presence of NaBPh4 yielded a heterometallic chain of [Mn-2(III)( saltmen)(2)Ni-II(pao)(2)(phen)](BPh4)(2) (Mn2Ni-BPh4) having a [-Mn-III-ON-Ni-II-NO-Mn-III-(OPh)(2)-] repeating unit surrounded by a "zeolite-like" network of BPh4- anions. Thanks to such bulky ion-walls, each chain is not only structurally separated with a nearest inter-chain metal center dot center dot center dot metal distance of 14.4 angstrom ( Mn center dot center dot center dot Ni) but also magnetically extremely well isolated. This magnetic isolation and the ferromagnetic interactions between S = 3 anisotropic units constituting the chain play key roles that induce single-chain magnet behavior in this system.
机译:Mn(III)salen型二聚配合物[Mn-2(III)(盐)(2)(H2O)(2)](ClO4)(2)的组装反应(盐(2-)= N, N'-(1,1,2,2-四甲基乙烯)双(亚水杨基亚胺酸酯))和Ni(II)肟酸酯络合物,[Ni-II(pao)(2)(phen)](pao(-)=吡啶-2-aldoximate; phen = 1,10-phenothroline),在NaBPh4存在下产生[Mn-2(III)(saltmen)(2)Ni-II(pao)(2)(phen)]的杂金属链具有[-Mn-III-ON-Ni-II-NO-Mn-III-(OPh)(2)-]重复单元的(BPh4)(2)(Mn2Ni-BPh4),被“类沸石”网络包围BPh4-阴离子。由于这种笨重的离子壁,每条链不仅在结构上以最接近的链间金属中心点中心点中心点金属距离为14.4埃(Mn中心点中心点中心点Ni)隔开,而且在磁性上也非常隔离。这种磁隔离和构成链的S = 3个各向异性单元之间的铁磁相互作用起着关键作用,在该系统中诱发单链磁体行为。

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